Update: Just thought I'd update my situation with my Wav pumps. I sent both Wav pumps back to Neptune Systems for diagnostic/repair on Friday 6/22. To my surprise, I was called today (Tuesday 6/26) from a service manager from Neptune Systems with the results from their tests. Talk about fast! They must have tossed them on the workbench the same day they received them from USPS.
They found both pumps failed for the same reason and took full responsibility for it. He informed me both pumps will be replaced and shipped out to me right away. Can't get any better customer service than that! And in my opinion, the pumps are only half the purchase. The other half is how a company responds to problems with their product. In this case Neptune Systems stepped up to the plate and took care of their customer...me.